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OPENSTAX MICROBIOLOGY TEST BANK / OSX MICROBIOLOGY TEST BANK 2025/ALL CHAPTERS 1-26
OPENSTAX MICROBIOLOGY TEST BANK / OSX MICROBIOLOGY TEST BANK 2025/ALL CHAPTERS 1-26
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OPENSTAX MICROBIOLOGY TEST BANK /OSXMICROBIOLOGY TEST BANK 2025/ALL CHAPTERS 1-
26
, CHapter 1: An Invisible World
* = Right ANS
Multiple Choice
1. Which of the following is true of the microbial world?
A. All microbes are harmful.
B. Humans could survive without microbes.
C. Many microbes are helpful.*
D. Most microbes are pathogenic.
DIFF: Easy
ASM Standard: 23, 24
2. Which of the following is when humans first suspected the existence of microbes?
A. during the Industrial Revolution
B. in prehistoric times*
C. in the last century
D. within the last 500 years
DIFF: Easy ASM
Standard: 23
3. Which individual first observed unicellular organisms, which he called
“animalcules,” using a microscope he developed?
A. Robert Koch
B. Louis Pasteur
C. Thucydides
D. Antonie van Leeuwenhoek*
DIFF: Easy ASM
Standard: 6
4. To reduce the risk of open flame from Bunsen burners, microbiologists are
increasingly using which of the following devices for easy, rapid benchtop
sterilization of small pieces of equipment?
A. autoclaves
B. ethylene oxide
C. incubators
D. microincinerators*
DIFF: Easy ASM
Standard: 36
,5. The Swedish botanist known for having developed an important biological
classification system is which of the following people?
A. Ernst Haeckel
B. Carolus Linnaeus*
C. Louis Pasteur
D. Robert Whittaker
DIFF: Easy ASM
Standard: N/A
6. Which kingdom was the only one found in Empire Prokaryota?
A. Animalia
B. Fungi
C. Monera*
D. Protista
DIFF: Easy ASM
Standard: N/A
7. Which are the three currently accepted domains?
A. Archaea, Bacteria, and Eukarya*
B. Archaea, Prokaryota, and Eukaryota
C. Bacteria, Fungi, and Protista
D. Bacteria, Prokaryota, and Eukarya
DIFF: Easy
ASM Standard: N/A
8. Which two taxonomic units are typically used to identify an organism when using
binomial nomenclature?
A. domain and kingdom
B. genus and family
C. genus and species*
D. phylum and class
DIFF: Easy
ASM Standard: N/A
9. Which of the following is not true about the process of fermentation?
A. It can help preserve foods, preventing spoilage.
B. It converts sugars to organic acids, alcohols, and/or gases such as carbon dioxide.
C. It is carried out exclusively by unicellular eukaryotes such as yeast.*
D. It is used to make foods such as cheese and bread.
DIFF: Moderate
ASM Standard: 11, 23, 26
, 10. The Romans may have reduced their risk of waterborne infectious diseases by using
which of the following?
A. a variety of pharmaceutical products
B. aqueducts and a sewer system*
C. prophylactic antibiotics
D. quarantine of people with leprosy
DIFF: Moderate
ASM Standard: 23
11. For which of the following is Thucydides known?
A. developing an effective sewer system in ancient Greece, helping to reduce
levels of disease in cities
B. observing microbes, using a microscope, for the first time, even distinguishing
between bacteria and fungi
C. proposing that disease was caused by microorganisms
D. realizing that people who had been infected by the Athenian
plague hadimmunity to reinfection*
DIFF: Moderate ASM
Standard: 23, 31
12. Ernst Haeckel proposed a classification system consisting of which of the
following subgroups?
A. five kingdoms
B. four kingdoms*
C. two domains and three kingdoms
D. two domains and five kingdoms
DIFF: Moderate
ASM Standard: N/A
13. Viruses not included in phylogenetic trees for which of the following reasons?
A. It is too difficult to observe their characteristics.
B. They are acellular and nonliving.*
C. They do not have any genes, which prevents genetic analysis.
D. They lack a nucleus.
DIFF: Moderate
ASM Standard: 5
14. Which is the best description of the primary purpose of a phylogeny?
A. Phylogenies show all the alterative names for each species.
B. Phylogenies show all the common names for each species.
C. Phylogenies show evolutionary relatedness between organisms.*
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